The Selective Reaction of Primary Amines with Carbonyl Imidazole Containing Compounds: Selective Amide and Carbamate Synthesis
作者:Steve P. Rannard、Nicola J. Davis
DOI:10.1021/ol006020n
日期:2000.7.1
A new highly selective synthesis of amides and carbamates is described. In both cases the syntheses involve the formation of carbonyl imidazole intermediates which subsequently undergo previously unreported selective reactions with primary amines. Acid imidazolides with sufficient chain length will exclusively react with primary amines even in the presence of secondary and tertiary functionality. The
Controlled Synthesis of Asymmetric Dialkyl and Cyclic Carbonates Using the Highly Selective Reactions of Imidazole Carboxylic Esters
作者:Steve P. Rannard、Nicola J. Davis
DOI:10.1021/ol9908528
日期:1999.9.1
[GRAPHICS]A new highly selective synthesis of dialkyl carbonates is described. The procedures rely on the previously unknown selectivity of imidazole carboxylic esters synthesized by the reaction of 1,1'-carbonyldiimidazole with alcohols. The imidazole carboxylic esters of secondary or tertiary alcohols form carbonates through the exclusive reaction with primary alcohols in polyols containing mixtures of primary, secondary, and tertiary hydroxyl groups without the need for protection, Controlled cyclic carbonate formation is also described.
A Highly Selective, One-Pot Multiple-Addition Convergent Synthesis of Polycarbonate Dendrimers